Comparative response of two organic biofilters treating ethylbenzene and toluene after prolonged exposure

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• 作者：G. Gallastegui ; A. Barona ; ^{astrid.barona@ehu.es} ; N. Rojo ; L. Gurtubay ; A. Elí ; as
• 关键词：Biofiltration ; Toluene ; Ethylbenzene ; Organic packing material ; Biodegradation
• 刊名：Process Safety and Environmental Protection
• 出版年：2013
• 出版时间：January-March, 2013
• 年：2013
• 卷：91
• 期：1-2
• 页码：112-122
• 全文大小：1533 K

文摘

The response of two biofilters filled with an organic waste material for treating ethylbenzene and toluene was studied for 415 and 472 operating days, respectively. The peak elimination capacities (EC_MAX) recorded were 170 g m^?3 h^?1 for ethylbenzene (EC_MAX) and 138 g m^?3 h^?1 for toluene. Regarding the degradation profile through the biofilters, an increase in the inlet concentration displaced the degradation profile into the downstream section. A sudden decrease in the performance of both biofilters occurred when the moisture content (MC) of the packing material exceeded 37 % for ethylbenzene and 30 % for toluene. Thus, a recommended MC value was established in the 15-30 % range. Given the bioreactor was operated at a low MC level, fungi prevailed over bacteria. Nevertheless, synergism was detected between both microorganism types for the mineralization of the aromatic hydrocarbons.